[RTnet-developers] Trying to fix bug in RTNET v0.7

[<alk...@ot...>]

Hello again, 
I am trying to trace the root-cause of a failure to execute
"callback_func(rt_socket_context(sock), callback_arg);"
source file: af_packet.c 
RTNET v0.7

Through the use of my solution/tool I am working on, and some debug
messages, I have reached the conclusion that this only happens when
"ifindex != 0" and as a result the socketbuffer memory is de-allocated
(kfree_rtskb(skb)). 

callback_func fails to execute because ifindex seems not to have been
initialized and prints a random value. 
Now this means that in ifindex=sock->prot.packet.ifindex,
sock->prot.packet.ifindex is not initialized either, maybe due to the
uncommon (hardcore would be more precise) way of typecasting
"rtpacket_type pt" and initializing "sock"...here take a look:

struct rtsocket *sock = (struct rtsocket *)(((u8 *)pt) - 
((u8 *)&(struct rtsocket *)0)->prot.socket));

and it all comes down to "pt"...what goes so wrong with "pt" to
(indirectly)contain a non-initialized pointer to ifindex???

Thank you even reading through this mumbo-jumbo!